Can someone explain the date of issue for some old patents that have
an antedated date? For instance, US97328 reads as follows:
Specification forming part of Letters Patent No. 97,328, dated
November 30, 1869; antedated November 24, 1869.
It would be helpful if someone could explain under what law or
regulation this was done, and how the practice changed over the years.
Regards,
Steve Reynolds
DuPont
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